Re: What controls RMAN history size in controlfile?

>> No more than 20,000 blocks (likely 156mb) there's a hard limit. :( Do you
> actually *need* a controlfile autobackup every 15 minutes though?

Perhaps not. But archivelog backups must be done every 15 minutes or
LOG_ARCHIVE_DEST_1 will fill up during our regular data refreshes. And
since I'm not using an RMAN catalog, autobackup is on. I believe that
trying to manage when a controlfile backup is really needed and isn't would
be worse than the overhead I'm seeing now.